JavaScript onmouseup or addEventListener javascript addeventlistener onmouseup,window addeventlistener onmouseup,js addeventlistener onmouseup,document

They are equally fast, or if not they are so close it doesn't matter one way or another. The goal is readability.

Suppose you have a card game and you want to drag the card on screen around using the new html5 drag and drop api.

You could write:

<div id="card_1" ondragstart='function(this);' ondragenter='function(this);' ondragover='function(this);' ondragleave='function(this);' class='card'></div>

Or you could write this:

function initialize_event_listeners(){
    var cards = document.getElementsByClassName('card');
    for(var i = 0; i < cards.length; i++){
        cards[i].addEventListener('dragstart', function, false);
        cards[i].addEventListener('dragenter', function, false);
        cards[i].addEventListener('dragover', function, false);
        cards[i].addEventListener('dragleave', function, false);
    }
}

Now say you had 10 cards, and you wanted to drop the native drag and drop support and use something else. In that scenario which would you rather use? Personally I would take the function...

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